Fluorine is an analogue of which group in the periodic table?

Fluorine is an element in the periodic table that belongs to the group known as halogens. The halogens are found in Group 17, and they include fluorine, chlorine, bromine, iodine, and astatine. These elements are characterized by their high reactivity, particularly with alkali and alkaline earth metals. Fluorine, being the most electronegative element, readily forms compounds with many other elements.

Group 1, which contains alkali metals, consists of lithium, sodium, potassium, and others, which are very different in chemical behavior compared to halogens. Hydroxide is not a group in the periodic table but rather a polyatomic ion (OH⁻) that can be part of various compounds. Noble gases, located in Group 18, are known for their lack of reactivity due to having a full complement of electrons in their outer shell, further distinguishing them from the highly reactive halogens. Thus, fluorine's characteristics and positioning in the periodic table clearly align it with the halogens, making that the correct identification.